Fire and water proof building material.



MARK GARTERED BAY, OF PERTH AMBOY, NEW JERSEY.

FIRE AND WATER PROOF BUILDING MATERIAL.

Specification of Letters Patent. Application filed December 28, 1907. Serial No. 408,372.

To all whom. it may concern:

Be it known that I, MARK GARTERED RAY, a citizen of the United States, residing at Perth Amboy, in the county of MiddleseX and State of New ersey, have invented new and useful Improvements in Fire and Water Proof Building Material, of which the following is a specification.

This invention elates to com osite building material, and it has for its 0 ject to produce a fire roof and water proof material which may used in sheet or broad board form, as a substitute for lath and plastering, and for other purposes. a

To this end my invention consists in the combination and union of ingredients formingfire and water proof building material as l hereinafter more fully described and particularly set forth in the claim.

To make boards according to my invention to serve as a substitute for lath and plaster, I take first, a sheet of soft, unsized pa er board of convenient width and length to e easily handled, say wide enough to extend from center to center of the first and third studs and overlap ing one stud midway, and in length anyw iere from three feet to the height of the room, and lay this sheet u on a table and coat it heavily with hot g ue. On that I place a sheet of asbestos; on that another coat of glue; on that another sheet of soft paper board, and so on untilthe desired thickness is attained. Then I place this slab of sheets and glue under a heavy press and let it remain until it is dry enough for the glue to become set. To obtain a glue which is impervious to water I use a gum that is soluble only in strong spirit, preferably shellac dissolved in alcohol to the cons stency of thick varnish. This constitutes a very strong glue but it has not suflicient allinity for either the asbestos or the pulp of the paer board to penetrate them much yet, a sizmg having a watery menstruum readily saturates them. I therefore prepare first, a thin paste of some adhesive substance such as common flour, or animal mix it in about equal proportions with the dissolved shellac, hot, and immediately apglue in water, and

| double ofiice of holding t l l l l l l l I even though the Patented April 21, 1908.

ply it as the glue between the boards, above referred to. This watery aste erforms the iie sheillac in solution during the time required to ap 1y it, alcohol which dissol ved it becomes evaporated by the heat; and of readily permeating the porous boards and carrying with it the closing the ores of the individual boards, and, under tie pressure applied, uniting the whole mass as a single board impervious to water.

This composite board has some elasticlty; is extremely strong; cannot be split and does not flake off when nails are driven throu h it.-

It may be sawed, planed, or turned in a athe like very close grained wood, and is susceptible to a high polish. In its lastic condition, when 'pi'led u as a sla it may be pressed into molds For ornamental purposes and worked much like sheet meta. As a substitute for lath and plaster it may be immediately covered with wall pa er; no need of waiting for it to dry. By fil ing the line joints with the glue described, and sand papering the lines, a surface as smooth as calcimine may be provided for painting or other decoration. Being firmly nailed to the house timbers this boarding cannot be jarred off, and water from leaky roofs will not injure it. The asbestos in it is particularly de- 1siigned to prevent or to stop the spreading of res.

find shellac to be the best gum to use for the glue, but any of the resinous gums which are insoluble in water and require strong spirit as a solvent, may be used; and I may use as a leader to this gum, any starchy or glutinous substance that is readily soluble in water, provided itsnature and proportions are such that its union under pressure with the gum used renders it impervious to water.

Having thus fu y described my invention, what I believe tobe new and desire to secure by Letters Patent is the following:

1. In building material, the combination of one or more sheets of'soft paper board, with one or more sheets of asbestos, and a shellac, thus entirely So far as my experiments have extended ID gum shellac dissolved in alco 01, and a paste dissolved in water, al combined as described. 10 having Water as a menstruum. In testimony whereof I aflix my signature, 2. A building material com rising one or in presence of two subscribing witnesses,

glue uniting them; the said lue comprising consisting of a starchly or glutinous substance I 5 more sheets of soft paper boar one or more MARK GARTERED RAY sheets of asbestos and a glue uniting them; Witnesses: the glue com rising a resinous gum dissolved S. R. FARRINGTON,

in spirits an insoluble in waten'and a leader TULU DIMOND. 

